Improvement in globe-calves for steam and other enginery



alla s faits @anni OF BOSTON, MASSACHUSETTS.

`fanart Patent No. 86,447, am@ Femm@ 2, ieee.

IMPRQVEMENT IN GLOBE-YALVES FOR STEAM AND OTHER ENG-INERY.

`'.lllle Schedule yreferred to in these Letters Patent and making` part of the same.

To all to whom th'csc presents shall come:

Beit known ,that we, BENJAivmv F. Rxnronn, of Hyde Park, in the county of Norfolk, and Common'- wealth of Massachusetts, and DAMEL SAWYER, of goston, in the county of Suffolk, and Commonwealth aforesaid, haveI made a new and useful invention of certain Improvements in Valves for Steam and other Purposes; and do hereby declare the following to be a full, clear, and exact description thereof, due reference being had to the accompanying drawings, making part of this specication, and in which- Figure l is a-vertical' central and longitudinal section, and 1 Figure 2, a-horizontal section of avalve containing our invention or improvements.

Figure 3, an inner face view. of one of the twin-valve disks, to be hereinafter referred to and explained.

` The invention comprising the subject of this application may be considered in the light of 'an improvement upon that for which Letters Patent of the United States of America were issued, on the 1st day of January, 1867, to Samuel J. Peet, of New York, for improvement in valves.

This patented valve consists in the employment of two metal disks, iitted in a box or shell, 'and closed against seats disposed vupon opposite sides of them by the interposition of a conical wedge aixed to or making part of a rod or bar extended downward from the upper part of the valve-case.

, In practical' operation of this valve, it has been found that when oxidation, corrosion, or roughening of the outer faces of the valve-disksand contiguous parts of the valve-case occurs, which is often the oase, these parts adhere when the Water-way of the valve is partially or wholly open, and the effect of any movement of the conical spreader, toward closing the valve, has the tendency to wedge thesefparts still more closely `together and render such closing of the valve impossible.

Our invention relates to means for insuring at all times, and in a smooth; and evenV manner, the movements of the valve-disks, and consists in the employment of a wedge of any proper form, isolated from the actuating-rod of the valve except through the medium of the disks, such wedge serving to force apart the disks and against their seats, but not aiding in the elevation or depression of thesame, the latter being effectcd'by the rod before mentioned.

In the drawingsbefore mentioned as accompanying this specification and illustrating our invention,

A denotes the shell,

B, thestuffing-box and cap, and

C, the rod, which eifects the movements of the valve, such parts'being constructed in manner and of; metal similar to many valves now in general use;

The steam or water-way of the valve is' shown at D, passing through the shellA, at right angles to the i axis of the rod '0, 'such steam-Way having two -ilat valve-seats, Gr G, disposed within it, thus forming a centralcavity or valve-chamber, E.

Within this chamber E are disposed loosely two twinshaped disks, F F, such disks, by reciprocating vertical movements, serving to open or close the passage through the steam-way D, as occasion requires.

The disks F F are susceptible of free move-ments to and away from the seats G G, and are supported in position by suspension in a suitable manner from the lower extremity of the rod C, or its equivalent.

The central part of the inner. face of each disk, F, is formed with a-tapering or conical-.shaped recession,

H, such two recessions,'when in conjunction, serving' to 'retain an interposed conical or tapering spreader, I, extending downward through or between the disks, and resting, when such disks are at their lowest position, upon the bottom of the valve-chamber, or upon a raised ledge or extension of such chamber, the shankv J ofthe spreader being of such proportionate size therewith, as to prevent the latter from dropping out of its positionbetween thedisks, when raised from contact with the bottom of the valve-chamber, during the ascent of the disks in the act of opening4 the passage of the steam-way.

The action of the above-described arrangement of parts is as follows,it being premised by the remark that the disks are at their highest elevatian within the valve-chamber, and the steamway,as a consequence, fulll open Uponturning'the` rod O in the right direction, by means of lits hand-wheel, K; such' rod and the disks F 'F are lowered, until the latter have arrived'nearly or-quite opposite vthe seats G G before mentioned.'

At'this-point, the lower end of the shank of the spreader 'I abuts against the. lo'wer surface of the valve-cl1amberand, as a consequence, a further slight loweringof the disks about such spreaderhas the effect of forcing them tightly up against the seats G G, and so as to'close the steam'fway in both directions. A slight elevation of the disk from this lowest position at once frees them from further action of theI spreader until they again reach this position.

It will be obvious'that as the spreader I has no effect upon the disks until they reach nearly-theirlowest position, and then only by their over-action, there is no possibility of such disks being illegitimately xed in position above their seats.

-Having now described our invention,

What we claim, and desire to secure vby Letters Patent, is i The arrangement ofthe spreader I, with reference to the disks F and disks G, substantially as herein :Beni F. RADFORD.

DANIEL sAwrnn.

Vshown and set forth.`

Witnesses FRED. Guerra, EDWARD GRIFFITH. 

